Friction-hinge



(No Model.)

J. GRANT. FRICTION HINGE.

No. 430,847. PatentedJune 24, 1890.

INVENTEIR MTNEEEEE )7M%/Z4/ mwam I UNITED STATES PATENT OF ICE.

J OTT GRANT, OF BOSTON, MASSACHUSETTS.

FRICTION-HINGE.

SPECIFICATION forming part of Letters Patent No. 430,847, dated June 24, 1890.

Application filed November 25, 1889. Serial No. 331,548. (No model.)

To all whom it may concern.-

Be it known that I, JOTT GRANT, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful I111- provement in Clamping-I-Iinges, of which the following, taken in connection with the accom panying drawings, is a specification.

The object of my invention is to so eonstruct a hinge for blinds, doors, 858., that it may act as an ordinary hinge, or by the turn ing of a screw become a clamp for holding the door or blind in any desired position. This object I attain by the mechanism shown in the accompanying drawings, in which Figure l is an elevation showing my hinge attached to a blind. Fig. 2 is a horizontal section of the same, taken on line a- 00 of Fig. 1. Fig. 3 is a view showing one of the principal parts of my device.

In the drawings I have shown one of my hinges as applied to an ordinary blind.

A, Figs. 1 and 2, represents that part of the window-frame to which the blind-hinges are usually attached, B being the 1:)intle-pieceand B the pintle.

S S represents the screws by which the pintle-piece is secured to the frame.

II II 1 1 Figs. 1 and 2, indicates the strap of the hinge, the part 11 being screwed to the blind by screws K, while the part II is bent so as to form an eye for the pintle. The extension H acts as alever, by the aid of which a clamping action is inadeto take place about the pintle B.

L L L is a lever-piece. One end L rests on the end of the hinge-strap, as shown in Figs. 1 and 2, the other end L bearing on the extension H (See Fig. 2.)

H, Figs. 1 and 2, is a part of the hingestrap, bent up so as to pass through a hole L made in the end of the lever-piece, and serves to assist in holding the lever-piece in place.

L Figs. 2 and 3, is a bolt attached to or made integral with the lever-piece L L L and passes through the blind, as shown in Fig. 2. Upon the inside end of the bolt L, I have a thumb-nut N, which, upon being screwed up, draws the lever-piece L L L so as to cause its end L to bear against the extension H of the strap of the hinge, and thus clamp the same to the pintle when it is desired to hold the blind in position.

To prevent the thumb-nutN from becoming detached from the bolt I1, I split the end of the said bolt, as shown at M, Figs. 2 and 3, and after the parts are all connected and the thumb-nut N screwed onto the bolt L the split parts of the bolt at M are turned away from each other, so that the thumb-nut can not be entirely removed from the bolt, although it may be worked as much as may be required for clamping and nnclamping the hinge.

I claim In aclaniping-hinge, the combination of the pintle B, strap II ll, having an extension II, with the clamping-lever L L I having a screw-bolt L and nut N, substantially as and for the purpose set forth.

JOT' GRANT.

\Vitnesses:

FRANK G. PARKER, MATTHEW M. BLUNT. 

